Tetraneuromyia lapponica Jaschhof & Jaschhof 2019, sp. nov.

• Main Authors: Jaschhof, Mathias, Jaschhof, Catrin
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2019
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Cecidomyiidae; Tetraneuromyia; Tetraneuromyia lapponica; Sorsele; Lule Lappmark; Ammarnäs; Lapponia; Lapland
• Online Access: https://doi.org/10.5281/zenodo.5942513

Tetraneuromyia lapponica sp. nov. Figs 36–38, 40 Diagnosis. Tetraneuromyia lapponica belongs to a subgroup of Tetraneuromyia with distinct gonocoxal processes bordering a small, U-shaped emargination (Fig. 38, ↓ 6); the other species belonging here are T. lenticularis , T. moldaviensis (Spungis, 1987), and T. wilksae . Each of these species has a distinctive tegmen, which in T. lapponica is structured as follows. The apex is made of two long, pointed processes, whose orientation is to the posterior end but with a slight bend to the ventral side; the process bases are blunt-ended, somewhat elongated and slightly bent ventrally (Fig. 40, ↓ 7); and the central trunk has a conspicuous, ovoid sclerotization dorsally (Fig. 40, ↓ 8). Female and larva of T. lapponica are unknown. Other male characters. Body size 1.3–1.5 mm. Head. Eye bridge 1 ommatidium long dorsally. Scape and pedicel concolorous with flagellum. Neck of fourth flagellomere 1.9–2.1 times as long as node (Fig. 36). Circumfila occasionally with posterior extensions of varying lengths. Thorax. Anepisternum asetose. Wing. 3.1 times longer than wide. M 1+2 absent. Setae on the anterobasal portion of membrane very sparse. Genitalia. Posterior edge of ninth tergite deeply emarginated (Fig. 38). Gonocoxae: ventral setae confined to lateral portions; gonocoxal processes long, narrow; dorsal apodemes angled posteriorly, with massive anterior processes (Fig. 38). Gonostylus slightly bent inwards, tapered towards apex, dorsoventrally compressed on apical half; 2–3 long, subapical bristles, 1 on ventral side, 1–2 on dorsal side (Fig. 37). Parameral apodemes very large (Fig. 40). Ejaculatory apodeme with subbasal thickening, slightly tapered towards apex (Fig. 38). Etymology. The species name, lapponica , is derived from Lapponia, the Latin name for Lapland, where the types of this species were collected. Type material. Holotype. Male, Sweden, Lule Lappmark, Sorsele, 8 km N Ammarnäs, 520 m above sea level, herb-rich subalpine birch forest, 12 August 2016, aspirator, ...